New York-based artist and technologist Adam Harvey, has just launched a Kickstarter programme to develop the signal-blocking phone case called Off Pocket.

Harvey also made headlines in January for his line of stealth clothing designed to hide wearers from the spying eyes of drones.

According to PopSci, the case is based on the technology behind the electric field-blocking Faraday cage, which protects electrical equipment from lightning strikes.

Like the cage, the Off Pocket contains a metal fiber mesh that blocks the wireless signals (frequencies between 800MHz and 2.4 GHz) coming from cell phone towers, bluetooth and Global Positioning System (GPS) satellites as they attempt to communicate with the user's mobile.

The Off Pocket is waterproof and 100 times stronger than conventional signal blocking bags used in law enforcement, the report said.